diff --git a/Assets/VRM10/Runtime/IO/Material/BuiltInRP/Import/BuiltInVrm10MaterialDescriptorGenerator.cs b/Assets/VRM10/Runtime/IO/Material/BuiltInRP/Import/BuiltInVrm10MaterialDescriptorGenerator.cs
index 8a5b82aab..e4d7c082b 100644
--- a/Assets/VRM10/Runtime/IO/Material/BuiltInRP/Import/BuiltInVrm10MaterialDescriptorGenerator.cs
+++ b/Assets/VRM10/Runtime/IO/Material/BuiltInRP/Import/BuiltInVrm10MaterialDescriptorGenerator.cs
@@ -10,11 +10,12 @@ namespace UniVRM10
         public BuiltInGltfPbrMaterialImporter PbrMaterialImporter { get; } = new();
         public BuiltInGltfDefaultMaterialImporter DefaultMaterialImporter { get; } = new();
         public BuiltInGltfUnlitMaterialImporter UnlitMaterialImporter { get; } = new();
+        public BuiltInVrm10MToonMaterialImporter MToonMaterialImporter { get; } = new();
 
         public MaterialDescriptor Get(GltfData data, int i)
         {
             // mtoon
-            if (BuiltInVrm10MToonMaterialImporter.TryCreateParam(data, i, out MaterialDescriptor matDesc)) return matDesc;
+            if (MToonMaterialImporter.TryCreateParam(data, i, out MaterialDescriptor matDesc)) return matDesc;
             // unlit
             if (UnlitMaterialImporter.TryCreateParam(data, i, out matDesc)) return matDesc;
             // pbr
diff --git a/Assets/VRM10/Runtime/IO/Material/BuiltInRP/Import/Materials/BuiltInVrm10MToonMaterialImporter.cs b/Assets/VRM10/Runtime/IO/Material/BuiltInRP/Import/Materials/BuiltInVrm10MToonMaterialImporter.cs
index 6a88ea029..6fba92303 100644
--- a/Assets/VRM10/Runtime/IO/Material/BuiltInRP/Import/Materials/BuiltInVrm10MToonMaterialImporter.cs
+++ b/Assets/VRM10/Runtime/IO/Material/BuiltInRP/Import/Materials/BuiltInVrm10MToonMaterialImporter.cs
@@ -11,14 +11,26 @@ using OutlineWidthMode = UniGLTF.Extensions.VRMC_materials_mtoon.OutlineWidthMod
 namespace UniVRM10
 {
     /// <summary>
-    /// Convert MToon parameters from glTF specification to Unity implementation.
+    /// A class that generates MaterialDescriptor for "VRM10/MToon10" shader based on vrm-1.0 Material specification.
+    ///
+    /// https://github.com/vrm-c/vrm-specification/blob/master/specification/VRMC_materials_mtoon-1.0/README.md
     /// </summary>
-    public static class BuiltInVrm10MToonMaterialImporter
+    public class BuiltInVrm10MToonMaterialImporter
     {
+        /// <summary>
+        /// Can be replaced with custom shaders that are compatible with "VRM10/MToon10" properties and keywords.
+        /// </summary>
+        public Shader Shader { get; set; }
+
+        public BuiltInVrm10MToonMaterialImporter(Shader shader = null)
+        {
+            Shader = shader != null ? shader : Shader.Find("VRM10/MToon10");
+        }
+
         /// <summary>
         /// VMRC_materials_mtoon の場合にマテリアル生成情報を作成する
         /// </summary>
-        public static bool TryCreateParam(GltfData data, int i, out MaterialDescriptor matDesc)
+        public bool TryCreateParam(GltfData data, int i, out MaterialDescriptor matDesc)
         {
             var m = data.GLTF.materials[i];
             if (!UniGLTF.Extensions.VRMC_materials_mtoon.GltfDeserializer.TryGet(m.extensions,
diff --git a/Assets/VRM10/Runtime/IO/Material/URP/Import/Materials/UrpVrm10MToonMaterialImporter.cs b/Assets/VRM10/Runtime/IO/Material/URP/Import/Materials/UrpVrm10MToonMaterialImporter.cs
index 515f2fb77..ada10ec84 100644
--- a/Assets/VRM10/Runtime/IO/Material/URP/Import/Materials/UrpVrm10MToonMaterialImporter.cs
+++ b/Assets/VRM10/Runtime/IO/Material/URP/Import/Materials/UrpVrm10MToonMaterialImporter.cs
@@ -7,14 +7,26 @@ using VRM10.MToon10;
 namespace UniVRM10
 {
     /// <summary>
-    /// Convert MToon parameters from glTF specification to Unity implementation.(for URP)
+    /// A class that generates MaterialDescriptor for "VRM10/Universal Render Pipeline/MToon10" shader based on vrm-1.0 Material specification.
+    ///
+    /// https://github.com/vrm-c/vrm-specification/blob/master/specification/VRMC_materials_mtoon-1.0/README.md
     /// </summary>
-    public static class UrpVrm10MToonMaterialImporter
+    public class UrpVrm10MToonMaterialImporter
     {
+        /// <summary>
+        /// Can be replaced with custom shaders that are compatible with "VRM10/Universal Render Pipeline/MToon10" properties and keywords.
+        /// </summary>
+        public Shader Shader { get; set; }
+
+        public UrpVrm10MToonMaterialImporter(Shader shader = null)
+        {
+            Shader = shader != null ? shader : Shader.Find("VRM10/Universal Render Pipeline/MToon10");
+        }
+
         /// <summary>
         /// VMRC_materials_mtoon の場合にマテリアル生成情報を作成する
         /// </summary>
-        public static bool TryCreateParam(GltfData data, int i, out MaterialDescriptor matDesc)
+        public bool TryCreateParam(GltfData data, int i, out MaterialDescriptor matDesc)
         {
             var m = data.GLTF.materials[i];
             if (!UniGLTF.Extensions.VRMC_materials_mtoon.GltfDeserializer.TryGet(m.extensions, out var mtoon))
diff --git a/Assets/VRM10/Runtime/IO/Material/URP/Import/UrpVrm10MaterialDescriptorGenerator.cs b/Assets/VRM10/Runtime/IO/Material/URP/Import/UrpVrm10MaterialDescriptorGenerator.cs
index be2e060cf..63b747d77 100644
--- a/Assets/VRM10/Runtime/IO/Material/URP/Import/UrpVrm10MaterialDescriptorGenerator.cs
+++ b/Assets/VRM10/Runtime/IO/Material/URP/Import/UrpVrm10MaterialDescriptorGenerator.cs
@@ -10,11 +10,12 @@ namespace UniVRM10
         public UrpGltfPbrMaterialImporter PbrMaterialImporter { get; } = new();
         public UrpGltfDefaultMaterialImporter DefaultMaterialImporter { get; } = new();
         public BuiltInGltfUnlitMaterialImporter UnlitMaterialImporter { get; } = new();
+        public UrpVrm10MToonMaterialImporter MToonMaterialImporter { get; } = new();
 
         public MaterialDescriptor Get(GltfData data, int i)
         {
             // mtoon
-            if (UrpVrm10MToonMaterialImporter.TryCreateParam(data, i, out var matDesc)) return matDesc;
+            if (MToonMaterialImporter.TryCreateParam(data, i, out var matDesc)) return matDesc;
             // unlit
             if (UnlitMaterialImporter.TryCreateParam(data, i, out matDesc)) return matDesc;
             // pbr
diff --git a/Assets/VRM10_Samples/VRM10Viewer/MaterialImporter/UrpMToonMaterialImporter.cs b/Assets/VRM10_Samples/VRM10Viewer/MaterialImporter/UrpMToonMaterialImporter.cs
index b0b04f5c1..85d939350 100644
--- a/Assets/VRM10_Samples/VRM10Viewer/MaterialImporter/UrpMToonMaterialImporter.cs
+++ b/Assets/VRM10_Samples/VRM10Viewer/MaterialImporter/UrpMToonMaterialImporter.cs
@@ -7,9 +7,11 @@ namespace UniVRM10.VRM10Viewer
     /// </summary>
     public class UrpMToonMaterialImporter : IMaterialImporter
     {
+        public UrpVrm10MToonMaterialImporter MToonMaterialImporter { get; } = new();
+
         public bool TryCreateParam(GltfData data, int i, out MaterialDescriptor matDesc)
         {
-            if (UrpVrm10MToonMaterialImporter.TryCreateParam(data, i, out matDesc))
+            if (MToonMaterialImporter.TryCreateParam(data, i, out matDesc))
             {
                 return true;
             }